The Collaborative International Dictionary of English v.0.48:

Unsubject \Unsubject\
   See subject.

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "unsubject":
   chartered, excepted, excused, exempt, exempted, favored, immune,
   irresponsible, let off, licensed, permitted, privileged, released,
   spared, unaccountable, unanswerable, unbroken, unconquered,
   unenthralled, ungoverned, unliable, unquelled, unsubdued, untamed,
   unvanquished